Insights on the electrooxidation of formaldehyde over bimetallic Co2V2O7 nanorod and its implication towards water electrolysis

IF 3.4 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Solid State Sciences Pub Date : 2025-03-14 DOI:10.1016/j.solidstatesciences.2025.107903

S. Ashoka , H.M. Akshaya , M. Shirisha , N.S. Venkataramanan , K. Yogesh , Narayana Sanaga , R.T. Yogeeshwari

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引用次数: 0

Abstract

Potential electrocatalytic system based on monoclinic Co₂V₂O₇ nanorods (Co₂V₂O₇ NRs) is proposed to realize formaldehyde (H₂CO) assisted green hydrogen production at ultra-low overpotential in an alkaline electrolyte. The mechanistic knowledge of H₂CO assisted hydrogen production over Co₂V₂O₇ NR surface is gained by the combination of experimental and density functional theory. The computational studies confirm that the Co₂V₂O₇ surface exhibit highest adsorption energy of −0.185 eV towards H₂CO oxidation compared to V₂O₅ (−0.144 eV) and Co₃O₄ (−0.108 eV). The Co₂V₂O₇ NRs renders kinetically more favorable surface for selective oxidation of H₂CO (SOF) compared to its counterparts Co₃O₄ and V₂O₅. The SOF over Co₂V₂O₇ NR surface results in green hydrogen at ultra-low overpotential and high-valued low-cost chemical formic acid. The Co₂V₂O₇ NRs exhibit an ultra-low onset potential of 1.26 V vs RHE towards FOR in three electrode configuration while Co₂V₂O₇ NRs || Co₂V₂O₇ cell needs a low cell potential of only 1.48 V at 10 mA cm⁻² in H₂CO assisted hydrogen production. The proposed research opens a new way to treat H₂CO contaminated water with simultaneous production of green hydrogen.

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双金属Co2V2O7纳米棒上甲醛的电氧化及其对水电解的意义

提出了基于单斜Co2V2O7纳米棒（Co2V2O7 NRs）的电位电催化体系，在碱性电解质中实现甲醛（H2CO）辅助的超低过电位绿色制氢。结合实验和密度泛函理论，获得了Co2V2O7 NR表面H2CO辅助制氢的机理。计算研究证实，Co2V2O7表面对H2CO氧化的吸附能最高，为- 0.185 eV，高于V2O5 （- 0.144 eV）和Co3O4 （- 0.108 eV）。与Co3O4和V2O5相比，Co2V2O7 NRs在动力学上更有利于H2CO （SOF）的选择性氧化。Co2V2O7 NR表面上的SOF可获得超低过电位的绿色氢和高价值的低成本化学甲酸。在三电极配置下，Co2V2O7 NRs对FOR具有1.26 V vs RHE的超低起始电位，而Co2V2O7 NRs ||在H2CO辅助制氢条件下，Co2V2O7电池在10 mA cm−2时仅需1.48 V的低起始电位。本研究为同时生产绿色氢处理H2CO污染水开辟了一条新途径。

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来源期刊

Solid State Sciences 化学-无机化学与核化学

CiteScore

6.60

自引率

2.90%

发文量

214

审稿时长

27 days

期刊介绍： Solid State Sciences is the journal for researchers from the broad solid state chemistry and physics community. It publishes key articles on all aspects of solid state synthesis, structure-property relationships, theory and functionalities, in relation with experiments. Key topics for stand-alone papers and special issues: -Novel ways of synthesis, inorganic functional materials, including porous and glassy materials, hybrid organic-inorganic compounds and nanomaterials -Physical properties, emphasizing but not limited to the electrical, magnetical and optical features -Materials related to information technology and energy and environmental sciences. The journal publishes feature articles from experts in the field upon invitation. Solid State Sciences - your gateway to energy-related materials.